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淺層砂過濾器

淺層砂過濾器JLQG

文字:[大][中][小] 2014-9-28    瀏覽次數:2802    
淺層砂過濾器工作原理:

過濾狀態
  當系統處于過濾狀態時,未經過濾的水通過上部的三級布水器,配合球形外殼,以接近平流的狀態到達過濾器內的填料層。當水流過填料層時,雜質被截留在填料層內。過濾器底部有55個蘑菇狀的過濾集水器,將過濾后的水均勻地收集并流出。平流過濾,決定了過濾器可以在高的流速下過濾,仍可達到較好的過濾效果。
反洗狀態
  隨著雜質在填料層中的不斷聚積,壓頭損失(即壓差)將不斷增大。當壓差到達一定的設定限度或過濾時間達到設定值時,系統將自動轉換至反洗狀態,以清洗聚積起來的雜質,對系統來說,經常性的反洗以清除聚積起來的雜質是必須的。
    當系統進入反洗狀態時,系統的控制器通過改變入口三通閥門位置,將其他過濾罐的經過過濾的水部分導入要反洗的過濾罐中。被反洗的過濾單元的填料層在水流的沖擊下被沖起,雜質則通過入口三通閥的排污口被排出。
   JLQG系統中,特殊設計的集水器使填料層在反洗狀態時形成內環流,填料之間互相搓洗,最大限度地提高反沖洗效率,減少所需的反洗水,同時反洗時不跑填料。 當反洗結束時,閥門又回復到過濾狀態,而下一個過濾單元則依次進入反洗狀態。一般一個系統可能由多過濾罐(單元)組成,它們依次反洗,以保證反洗時連續出水。

      當系統處于反洗狀態時,過濾仍然繼續,其中要進行反洗的標準單元過濾罐不進行過濾,系統中其它標準單元過濾罐仍然在過濾。過濾后的清潔水部分用來反洗標準單元過濾罐,其余仍送到用戶處。反沖洗污水則通過水力閥的反洗排水口被排出。在淺層砂過濾系統中,特殊的集水器設計可使填料之間填料相互搓洗,最大限度地提高反沖洗效率,減少所需的反洗水(清潔水),同時反洗時沒有跑料現象。一個標準單元過濾罐反洗為2分鐘,反沖洗結束,標準單元過濾罐內部壓頭損失減小到合理范圍,定壓裝置給出復原信號,排污閥恢復到過濾狀態,下一個標準單元過濾罐則準備進入反洗狀態。

 

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